Topic: "Positive Interventions and Effective Strategies", How to Turn Lemons into Lemon Meringue Pie by Laura Riffel, Ph.D.. Dr. Riffel is a behavior specialist who has trained thousands of teachers, parents, counselors, psychologists, administrators, and bus drivers how to make data based decisions as a way to change behavior. Her trainings are filled with humor and make data collection easy to understand and use in the classroom.